×

Regulated bi-directional DC-to-DC voltage converter which maintains a continuous input current during step-up conversion

  • US 5,255,174 A
  • Filed: 10/18/1991
  • Issued: 10/19/1993
  • Est. Priority Date: 10/18/1991
  • Status: Expired due to Term
First Claim
Patent Images

1. A bi-directional DC-to-DC voltage converter, which comprises:

  • a boost sub-circuit having a positive input/output terminal and a negative input/output terminal;

    a bridge sub-circuit having a positive input/output terminal and a negative input/output terminal, said negative input/output terminal being coupled to the negative input/output terminal of the boost sub-circuit;

    a transformer having a primary and a secondary winding, said primary winding having a first terminal and a second terminal, said secondary winding having a first terminal, a second terminal, and a center-tap terminal;

    a first filter capacitor coupling the positive and negative input/output terminals of said boost sub-circuit;

    an inductor coupling the positive input/output terminal of said boost sub-circuit with the center-tap terminal of said transformer;

    a first switching means interposed between the first terminal of said secondary winding and the negative input/output terminal of said boost sub-circuit;

    a first rectifying means interposed between the first terminal of said secondary winding and the negative input/output terminal of said boost sub-circuit, and polarized so as to allow current to flow from the negative input/output terminal of said boost sub-circuit to the first terminal of said secondary winding;

    a second switching means interposed between the second terminal of said secondary winding and the negative input/output terminal of said boost sub-circuit;

    a second rectifying means interposed between the second terminal of said secondary winding and the negative input/output terminal of said boost sub-circuit, and polarized so as to allow current to flow from the negative input/output terminal of said boost sub-circuit to the second terminal of said secondary winding;

    a third switching means interposed between the second terminal of said primary winding and the negative input/output terminal of said bridge sub-circuit;

    a third rectifying means interposed between the second terminal of said primary winding and the negative input/output terminal of said bridge sub-circuit, and polarized so as to allow current to flow from the negative input/output terminal of said bridge sub-circuit to the second terminal of said primary winding;

    a fourth switching means interposed between the second terminal of said primary winding and the positive input/output terminal of said bridge sub-circuit;

    a fourth rectifying means interposed between the second terminal of said primary winding and the positive input/output terminal of said bridge sub-circuit, and polarized so as to allow current to flow from the second terminal of said primary winding to the positive input/output terminal of said bridge sub-circuit;

    a fifth switching means interposed between the first terminal of said primary winding and the negative input/output terminal of said bridge sub-circuit;

    a fifth rectifying means interposed between the first terminal of said primary winding and the negative input/output terminal of said bridge sub-circuit, and polarized so as to allow current to flow from the negative input/output terminal of said bridge sub-circuit to the first terminal of said primary winding;

    a sixth switching means interposed between the first terminal of said primary winding and the positive input/output terminal of said bridge sub-circuit;

    a sixth rectifying means interposed between the first terminal of said primary winding and the positive input/output terminal of said bridge sub-circuit, and polarized so as to allow current to flow from the first terminal of said primary winding to the positive input/output terminal of said bridge sub-circuit;

    a second filter capacitor coupling the positive and negative input/output terminals of said bridge sub-circuit.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×